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This article mainly explains "how to change root password and empower remote login by MySQL". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how MySQL changes the root password and empowers remote login".

1. Multiple methods for MySQL to modify root password

Execute SET PASSWORD FOR 'root'@'localhost' = PASSWORD (' newpass') directly under Navicat for MySQL; you can

Method 1: use the SET PASSWORD command

Mysql-u root

Format: mysql > set password for username @ localhost = password ('new password')

Example: mysql > set password for root@localhost = password ('1234')

Method 2: use localhost modified only by mysqladmin

Format: mysqladmin-u username-p old password password new password. P and old passwords have no spaces, for example

1. If root does not have a password, add a password to root. First enter the directory mysql\ bin under DOS, and then type the following command

[root@BI-162] # mysqladmin-u root password 123

2. If root has already set the password, change the password of root to 234p and the old password has no spaces.

[root@BI-162] # mysqladmin-u root-p123 password 1234

Method 3: edit the user table directly with UPDATE

Mysql-u root-p

Mysql > use mysql

Mysql > UPDATE user SET password = PASSWORD ('new password') WHERE user = 'root'

Mysql > FLUSH PRIVILEGES

Or set local and remote login passwords respectively, which can be different

Mysql > update mysql.user set password=password ('123') where user='root' and host='localhost'

Mysql > update mysql.user set password=password ('123') where user='root' and host='%'

Update mysql.user set password=password ('123') where user='root' and host='BI-162'

Mysql > flush privileges

Method 4: you can do this when you forget your root password

KILL drops the MySQL process in the system

Mysqld_safe-skip-grant-tables&

Mysql-u root mysql

Mysql > UPDATE user SET password=PASSWORD ('new password') WHERE user='root'

Mysql > flush privileges

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Method 4: you can do this when you forget your root password

Take windows as an example:

1. Shut down the running MySQL service.

two。 Open the DOS window and change to the mysql\ bin directory.

3. Enter mysqld-- skip-grant-tables enter. Skip-grant-tables means to skip authorization table authentication when starting the MySQL service.

4. Open another DOS window (because the DOS window just now cannot be moved), and change to the mysql\ bin directory.

5. Enter mysql enter, and if successful, the MySQL prompt > will appear.

6. Connect permissions database: use mysql;.

6. Change the password: update user set password=password ('123') where user='root'; (don't forget to add the semicolon at the end).

7. Refresh permissions (required): flush privileges;.

8. Exit quit.

9. Log out of the system, enter again, and log in with the user name root and the new password 123 you just set.

Second, empower the remote server

Allow users to log in remotely at the specified IP. If you want to not limit the IP of the link, set it to "%".

Grant all PRIVILEGES on bidb.* to root@'%' identified by '123'

Grant all PRIVILEGES on pacs.* to root@'%' identified by '123'

Grant all PRIVILEGES on mysql.* to root@'%' identified by '123'

Grant all PRIVILEGES on test_db.* to root@'192.168.1.101' identified by '123456'

Grant all on *. * to root@'%' identified by 'root' with grant option

Mysql-u root-p

Mysql > use mysql

Mysql > select host, user, password from user

In addition, from this user table, we can build such an authority system. Same user name, using different passwords when logging in from different machines.

At this point, I believe that everyone has a deeper understanding of "how MySQL changes the root password and empowers remote login". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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